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A compound consists of atoms of two or more different elements, it can be broken down into a simpler type of matter and has properties that are different from its component elements and always contains the same radio of its atoms. A mixtures consists of two or more different elements ,can be separated into components by physical changes and chemical changes. An elements has only one kind of atom, has its own name and symbol and cannot be broken down by either physical and chemical changes.

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-- Neon element case study -- The features of "Neon" --- Symbol: Ne Atomic number of Neon- the atomic no. of Neon is 10 Atomic mass- approximately 20.18g rounded off to 2 decimal places. Melting Point: -248.6 °C (24.549994 K, -415.48 °F) Boiling Point: -246.1 °C (27.049994 K, -410.98 °F) Number of Protons: 10 Number of electrons: 10 Number of neutrons: 10 - Position of neon in the periodic table. Neon is the 10th element on the periodic table. It is located in period 2 and group 18. --- Abundances of the element in different environments % in Universe 0.13% % in Sun 0.1% % in Meteorites N/A % in Earth's Crust 3×10-7% % in Oceans 1.2×10-8% % in Humans N/A

Physical and chemical properties of "Neon" Neon is classified as a gas. Neon is classified as an element in the 'Noble Gases' section which can be located in group 18 of the Periodic Table. The term 'Noble gas' derives from the Old High German word Edelgas from 'edili' meaning "noble". --- Interesting things about Neon Neon is a rare gas that is found in the Earth's atmosphere Neon is obtained by liquefaction of air and separation using fractional distillation - obtained from liquid air! Examples: - Neon lights & signs -are from the element of neon! Fluorescent lights -are from the element of neon! And Lava lamps/ lanterns- -are from the element of neon! Facts: - Who invented the NEON LIGHTING? Neon lighting was invented by French chemist Georges Claude (1870-1960). A neon light consists of a glass tube filled with neon. An electric current goes through the tube which makes neon atoms to break apart. The parts recombine almost instantly, therefore they make the significant neon light. Neon has 40 times more refregirating capacity per unit volume in comparison to the liquid helium and more than three times of a liquid hydrogen as well. 🔼Geology Abundance of elements in the universe; the sun; meteorites; Earth's crust; oceans; and streams 🔼Biology Abundance in humans; biological role; and health hazards)
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The Periodic Table is important because of the reference of chemistry it has. All the known elements gets arranged in an informative display. Elements are placed in specific location on an organised table looking like a grid with rows and columns, showing what each element represents. The elements close to each other or placed on the same column share some similarities. For example: (Al) Aluminium and (Ga) Gallium, or (He) Helium and (Ne) Neon. By looking at the table the organized elements are based on the characteristics of an element just by the look of its placed position on the table.